Title (fr)

Publication

Application

Priority

CA 9800680 W 19980713

US 91807097 A 19970825

Abstract (en)

[origin: WO9910645A1] A valve assembly (14) has an internal main flow passage through a valve body (24) between a first port (25) and a second port (26), an electric actuator (30), and a valve (86) operated by an armature (58) of the actuator to selectively open and close the passage. A force-balancing mechanism (92) applies to the valve (86) a force that opposes force created by pressure differential between the first and second ports. The valve has cushion media (76, 80, 142) that cushions impact of lateral displacements of the armature and cushion media (76) for cushioning axial impact between the armature and stator. An overmold (32) encloses internal parts, and one of the ports contains sonic nozzle structure (28). The valve exhibits improved noise attenuation, durability, and performance.